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Discussion Starter · #1 ·
I have a liquid which appears to be fuel in my oil. My prior tank I made 18+ mpg like normal, but they past tank only made 10 which is why I believe its fuel. Problem is, I'm told fuel shouldnt float above the oil.

Oil is black with 3k miles on it
No loss in power
Antifreeze is where it has been for months
I took valve cover off and seen no unusual spray
the level of oil thats black is between Safe and Full, Above that is a lighter texture liquid with a black clear tint
Injector lines are tight
Temp gun to the exhaust manifold shows all tempts are close to each other at idle after 20min hard run
Pry bar to head and ear show no signs of knocking or irregular sounds

How possible is it to have a leak from the Injector pump, 163k Stock pump with a Airdog to it.
Got Edge at 140k and pressure was 5 at idle and 0 if stepped on throttle. As of now I dont know fuel pressure until I get the Edge attachment since cant find old one which came with Edge/Att.
 

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It could be a leaking injector but since you have no power loss and equal temperature at the exhaust ports im leaning towards something else.

I’m not familiar with the anatomy of a vp44, but is it possible that the shaft seal on the front of the pump is leaking fuel into the crankcase? I can’t say for sure but maybe someone else can. :popcorn:
 

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It's not leaking from the injection pump or lift pump.

Take a piece of computer paper and put a drop of oil on it and let it sit for 24 hours. If there's a light ring around the black spot then you have fuel in your oil. Start checking your connector tube o-rings and injector o-rings.
 

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It's not leaking from the injection pump or lift pump.

Take a piece of computer paper and put a drop of oil on it and let it sit for 24 hours. If there's a light ring around the black spot then you have fuel in your oil. Start checking your connector tube o-rings and injector o-rings.
Blue is right. more than likely and o-ring problem with the connector tubes.
 

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Discussion Starter · #8 ·
Well i got planned to take injectors out this weekend and see. Im bound to get new injectors, just gotta save the money
 

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Discussion Starter · #9 ·
Not sayin it is leakin from lift pump but wondering if its cause of it. I found my fp at 5idle at 140k but dont know how long stock lp was out. My problem is my truck NEVER has a starting problem. Always first click.
 

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that's another seperate problem. 5psi sure is out of wack. your airdog should provide 15psi and be able to maintain it. your tank strainer could be clogged or sucking air on suction side of airdog
 

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Discussion Starter · #11 ·
that's another seperate problem. 5psi sure is out of wack. your airdog should provide 15psi and be able to maintain it. your tank strainer could be clogged or sucking air on suction side of airdog
I'm at 165k. That problem was at 140k before I got the Airdog.
 

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Discussion Starter · #12 ·
Bigblue, I did that experiment and after only 3-4 hours it started making that light ring. After 12 hours, the 6 spots I made couple in. apart cover 1/4 of the paper.
 

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You've got fuel in your oil. Start inspecting connector tube and injector o-rings. Probably should send your injectors off and have them inspected to make sure nothing is wrong with them.
 

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connector tube o-rings will not leak into the oil, only injector o-rings will, also an injection pump can leak fuel into the front cover
 
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